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| 典型乌龙茶产区氮素平衡状况及减排潜力研究 |
| Nitrogen balance status and greenhouse gas mitigation potential in typical Oolong tea production areas |
| 投稿时间：2019-02-10 |
| DOI：10.13254/j.jare.2019.0068 |
| 中文关键词: 乌龙茶，氮肥优化用量，氮素平衡，温室气体减排 |
| 英文关键词: Oolong tea, optimum nitrogen rate, nitrogen balance, greenhouse gas mitigation |
| 基金项目:国家重点研发计划项目（2016YFD0200400，2016YFD0200401）；国家自然科学基金青年科学基金项目（31501832） |
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| 摘要点击次数: 1995 |
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| 中文摘要: |
| 为探讨典型乌龙茶产区氮素平衡状况及温室气体减排潜力，基于2015-2017年在福建省安溪县和武夷山市茶园开展的355户农户调研数据和207个土壤数据，采用Boundary line方法，分析了典型乌龙茶产区的氮肥施用特征、氮素平衡状况以及温室气体减排潜力。结果表明：安溪县茶园平均氮肥投入量509.4 kg·hm-2，主要来源于复合肥和尿素，全年氮盈余量479.1 kg·hm-2；武夷山市茶园平均氮肥投入量218.1 kg·hm-2，主要来源于复合肥，全年氮盈余量189.8 kg·hm-2；氮素投入与氮养分盈余量之间具有极显著的正相关关系；随着氮素盈余量的增加，土壤全氮含量也随之增加，并且安溪茶园的土壤全氮含量比武夷山茶园更高；基于Boundary line方法，安溪县和武夷山市茶园的氮肥优化用量分别为411.3 kg·hm-2和157.7 kg·hm-2；通过优化氮肥投入和管理水平可分别实现安溪县和武夷山市茶园温室气体减排62.0%和68.0%。在安溪县和武夷山市乌龙茶产区中，氮肥施用严重过量，导致氮素盈余量和温室气体排放量较高，应通过优化氮肥用量达到减少氮素过量盈余和降低茶园温室气体排放的目的。 |
| 英文摘要: |
| Farmer and soil surveys were conducted to explore the nitrogen balance and greenhouse gas emission reduction potential in typical Oolong tea gardens. Based on the Boundary line approach,survey data from 355 farmers and 207 soil tests in tea gardens of Anxi County and Wuyishan City in Fujian Province from 2015 to 2017 were collected to analyze the characteristics of nitrogen fertilizer application, nitrogen balance, and greenhouse gas emission reduction potential. The results showed that the average amount of nitrogen fertilizer input in Anxi County tea gardens was 509.4 kg·hm-2, mainly from compound fertilizer and urea, and the annual nitrogen surplus was 479.1 kg·hm-2. The average amount of nitrogen fertilizer input in tea gardens in Wuyishan City was 218.1 kg·hm-2, mostly from compound fertilizer, and the annual nitrogen surplus was 189.8 kg·hm-2. There was a significant positive correlation between nitrogen input and nitrogen nutrient surplus. With the increase of nitrogen surplus, soil total nitrogen content also increased, and the total nitrogen content of tea gardens in Anxi County was higher than that in Wuyishan City. Based on the Boundary line method, the optimal nitrogen fertilizer application rate in tea gardens of Anxi County and Wuyishan City was 411.3 kg·hm-2 and 157.7 kg·hm-2, respectively. The greenhouse gas emission could be reduced by 62.0% and 68.0% respectively by optimizing the input and management level of nitrogen fertilizer. This study demonstrated that excessive application of nitrogen fertilizer leaded to high surplus of nitrogen in the Oolong tea gardens of Anxi County and Wuyishan City in Fujian Province. The amount of nitrogen fertilizer should be optimized to reduce excessive surplus of nitrogen and reduce greenhouse gas emissions from tea garden. |
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